mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-28 23:34:53 +03:00
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/* Copyright (C) 2011-2013 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <sysdep-cancel.h>
|
|
#include <sys/syscall.h>
|
|
#include <kernel-features.h>
|
|
|
|
|
|
#ifdef __NR_sendmmsg
|
|
int
|
|
__sendmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags)
|
|
{
|
|
if (SINGLE_THREAD_P)
|
|
return INLINE_SYSCALL (sendmmsg, 4, fd, vmessages, vlen, flags);
|
|
|
|
int oldtype = LIBC_CANCEL_ASYNC ();
|
|
|
|
int result = INLINE_SYSCALL (sendmmsg, 4, fd, vmessages, vlen, flags);
|
|
|
|
LIBC_CANCEL_RESET (oldtype);
|
|
|
|
return result;
|
|
}
|
|
libc_hidden_def (__sendmmsg)
|
|
weak_alias (__sendmmsg, sendmmsg)
|
|
#elif defined __NR_socketcall
|
|
# ifndef __ASSUME_SENDMMSG
|
|
extern int __internal_sendmmsg (int fd, struct mmsghdr *vmessages,
|
|
unsigned int vlen, int flags)
|
|
attribute_hidden;
|
|
|
|
static int have_sendmmsg;
|
|
|
|
int
|
|
__sendmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags)
|
|
{
|
|
if (__builtin_expect (have_sendmmsg >= 0, 1))
|
|
{
|
|
int ret = __internal_sendmmsg (fd, vmessages, vlen, flags);
|
|
/* The kernel returns -EINVAL for unknown socket operations.
|
|
We need to convert that error to an ENOSYS error. */
|
|
if (__builtin_expect (ret < 0, 0)
|
|
&& have_sendmmsg == 0
|
|
&& errno == EINVAL)
|
|
{
|
|
/* Try another call, this time with an invalid file
|
|
descriptor and all other parameters cleared. This call
|
|
will not cause any harm and it will return
|
|
immediately. */
|
|
ret = __internal_sendmmsg (-1, 0, 0, 0);
|
|
if (errno == EINVAL)
|
|
{
|
|
have_sendmmsg = -1;
|
|
__set_errno (ENOSYS);
|
|
}
|
|
else
|
|
{
|
|
have_sendmmsg = 1;
|
|
__set_errno (EINVAL);
|
|
}
|
|
return -1;
|
|
}
|
|
return ret;
|
|
}
|
|
__set_errno (ENOSYS);
|
|
return -1;
|
|
}
|
|
libc_hidden_def (__sendmmsg)
|
|
weak_alias (__sendmmsg, sendmmsg)
|
|
# else
|
|
/* When __ASSUME_SENDMMSG sendmmsg is defined in internal_sendmmsg.S. */
|
|
# endif
|
|
#else
|
|
# include <socket/sendmmsg.c>
|
|
#endif
|